body {
  min-width: 320px;
  max-width: 750px;
  /* 总的750 */
  width: 10rem;
  margin: 0 auto;
  line-height: 1.5;
  font-family: Arial, Helvetica;
  background: #f2f2f2;
}
a {
  text-decoration: none;
  font-size: .333333rem;
}
/* img {
  width: 5.5rem;
  height: 1rem;
} */
@media screen and (min-width:750px) {
  html {
    /* !important提升权重 */
    font-size: 75px!important;
  }
}
.search-content {
  display: flex;
  position: fixed;
  top: 0;
  left: 50%;
  width: 10rem;
  height: 1.173333rem;
  background-color: #ffc001;
  transform: translateX(-50%);
}
.search-content .classify {
  width: .586667rem;
  height:.933333rem;
  margin: .146667rem .333333rem .133333rem;
  background: url(../images/classify.png) no-repeat;
  background-size:.586667rem .933333rem;
}
.search-content .search {
  flex: 1;
}
.search input {
  outline: none;
  width: 100%;
  border: 0;
  height: 66px;
  border-radius: .44rem;
  background-color: #fff2cc;
  margin-top: .133333rem;
  font-size: .333333rem;
  padding-left: .733333rem;
  color: #757575;
}
.search-content .login {
  width: 1rem;
  height: .933333rem;
  line-height: 1rem;
  margin: .133333rem;
  color: #fff;
  font-size: .333333rem;
  text-align: center;
}
.banner {
  width: 15rem;
  height: 7.36rem;
}
.banner img {
  width: 100%;
  height: 100%;
}
.ad {
  display: flex;
}
.ad a {
  flex: 1;
}
.ad a img {
  width: 100%;
}
nav {
  width: 15rem;
}
nav a {
  float: left;
  width: 3rem;
  height: 2.8rem;
  background-color: palegreen;
  text-align: center;
}
nav a img {
  display: block;
  width: 1.64rem;
  height: 1.64rem;
  margin: 0.2rem auto 0;
}
nav a span {
  display: block;
  font-size: 0.5rem;
  color: #333;
}
